PDF malware analysis — malicious · 2133f4dd8d7653de

MALICIOUS

PDF

97.0 KB Created: 2021-07-21 07:22:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 865e5eb6f06ff2d2eb9f87882db100a3 SHA-1: bc6b5b9d3816c920ca8b672a1f8eba49cd696ce3 SHA-256: 2133f4dd8d7653deac5b94185395b9521d61d0e509f11105b5dac3a63e73b598

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, indicating a phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. While no scripts were explicitly extracted, the nature of the link farm suggests it is designed to lure users to malicious content.

Machine Learning

Nyx PDF Classifier suspicious score 0.4391

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
External URI info PDF_URI

PDF contains an external URL action
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a2935db96de---genoxupuwus.pdf In PDF document text
- http://alexanderkanevskyartistbiography.com/clientMedia/file/1806043155.pdfIn PDF document text
- http://unnatiwelfareorganization.com/ckfinder/userfiles/files/15140334422.pdfIn PDF document text
- http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160f251d441edf---48402118038.pdfIn PDF document text
- https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0b22dc2c5---nubesagorakizizurugumizi.pdfIn PDF document text
- https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/kot9g08a3er42ui8klo5b90htg/4296865171.pdfIn PDF document text
- http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ad641a4b905---77211441111.pdfIn PDF document text
- http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b67676bdda9---74338583763.pdfIn PDF document text
- https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/uhvv8rhpf6tptb0fiqjkkobba4/31353760268.pdfIn PDF document text
- https://ukmriptek.org/codeIgniter-hmvc/userfiles/files/sufijijadiziwariduvigesat.pdfIn PDF document text
- http://syuncyoku.jp/upload/file/vopulusenavifufurivuwe.pdfIn PDF document text
- http://lexen.ca/userfiles/files/98108182161.pdfIn PDF document text
- https://clinicamanila.com/ckfinder/userfiles/files/46769224092.pdfIn PDF document text
- http://dreamcatcherltd.com/userfiles/file/92631582927.pdfIn PDF document text
- http://yfatc.com/userfiles/file/92809550209.pdfIn PDF document text
- http://a-swiss.com/upload/userfiles/file/purotopafoveso.pdfIn PDF document text
- https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/mmv2udc7vu2phpj8l89vuqkaom/1717228230.pdfIn PDF document text
- http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160aff9367e838---davumomipokutalekarumizi.pdfIn PDF document text
- https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/dti0ve57lfj35ojs6fjvrkuntd/wiguxeselaxenot.pdfIn PDF document text
- http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609262a28e9c1---lejirozapipoxuxogivexefet.pdfIn PDF document text
- https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/215ec427cf08eadd51b3d157db197dec/gewuridujenakimajizam.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=presidential+candidates+usa+todayPDF link annotation
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0001296d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1296D	17564 bytes
SHA-256: `7673945b880003e168a727bb43c60b0a30f709033c92412c3cff5b4944b06274`
`font_01_sfnt_off0001574c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1574C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00016f63.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16F63	10580 bytes
SHA-256: `ddca8f79b920f630242201f42069749c29cf4d01572a1ebbe1294224fa5fd793`

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